# o3 vs Qwen3.5 35B-A3B

> o3 is the stronger model overall, scoring 47.4 to 41.7 on the Noometry Index. Qwen3.5 35B-A3B costs 5.1× less per token, which makes it the better buy when o3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/o3-vs-qwen3-5-35b-a3b
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. o3 scores higher in 7 categories and Qwen3.5 35B-A3B in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where o3 leads 47.3 to 33.5.
- The biggest single-benchmark swing is Chess Puzzles: 38% for o3 and 10% for Qwen3.5 35B-A3B.
- Qwen3.5 35B-A3B is cheaper at $0.25 / $2 per million input/output tokens, against $2 / $8 for o3.
- Qwen3.5 35B-A3B accepts more context: 262K tokens versus 200K.
- Qwen3.5 35B-A3B has downloadable open weights; the other is API-only.

## Snapshot

| | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 47.4 | 41.7 |
| Rank | 53 | 118 |
| Context | 200K | 262K |
| Input $/M | $2 | $0.25 |
| Output $/M | $8 | $2 |
| Weights | Proprietary | Open |

## Coding

- o3: 47.3 (#57)
- Qwen3.5 35B-A3B: 33.5 (#244)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| LMArena Coding | 1408 | 1410 |
| SWE-bench Verified | 62.3% | — |
| SWE-bench Verified (bash only) | 58.4% | — |
| Aider Polyglot | 81.3% | — |
| LMArena WebDev | — | 1254 |
| SciCode | — | 29.3% |
| GSO | 8.8% | — |
| WeirdML | 52.4% | — |
| CadEval | 74% | — |
| ALE-Bench | 933.55 | — |

## Agentic & Tool Use

- o3: 34.3 (#42)
- Qwen3.5 35B-A3B: —

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| Berkeley Function Calling Leaderboard | 63% | — |
| GDPval | 30.8% | — |
| DeepResearch Bench | 45.2% | — |
| OSWorld | 23% | — |
| LMArena Search | 1144 | — |
| METR Time Horizons | 65.4% | — |

## Reasoning

- o3: 32.1 (#66)
- Qwen3.5 35B-A3B: 23.9 (#158)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| CritPt | 1.4% | 0.6% |
| Chess Puzzles | 38% | 10% |
| LMArena Hard Prompts | 1402 | 1400 |
| DTBench | 84.8% | 80% |
| LMCA | 39.7% | 29.5% |
| Epoch Capabilities Index | 146.88 | 142.52 |
| ARC-AGI-2 | 6.5% | — |
| SimpleBench | 53.1% | — |
| Kagi LLM Benchmark | 67.6% | — |
| ARC-AGI-1 | 60.8% | — |
| EnigmaEval | 13.1% | — |
| Mystery Game Puzzles | 29% | — |
| ForecastBench | 62.5 | — |

## Math

- o3: 48.9 (#49)
- Qwen3.5 35B-A3B: 38.4 (#86)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 84.4% | 70% |
| LMArena Math | 1426 | 1404 |
| FrontierMath (Tiers 1-3) | 33.3% | — |
| MathArena Final-Answer Competitions | — | 56% |
| Omni-MATH | 71.4% | — |
| MATH Level 5 | 97.8% | — |
| FrontierMath (Feb 2025 set) | 18.7% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- o3: 54.5 (#47)
- Qwen3.5 35B-A3B: 47.7 (#73)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| GPQA Diamond | 81.8% | 83.5% |
| LMArena Expert | 1403 | 1408 |
| Humanity's Last Exam | 20.3% | — |
| SimpleQA Verified | 49.4% | — |
| MMLU-Pro | 85.9% | — |
| Confabulations | 14.4% | — |
| Vectara Hallucination Rate | — | 10.5% |
| GPQA (HELM) | 75.3% | — |

## Multimodal

- o3: 40.7 (#35)
- Qwen3.5 35B-A3B: —

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| LMArena Vision | 1214 | — |
| GeoBench | 74% | — |
| VPCT | 52% | — |

## Multilingual

- o3: 51.9 (#99)
- Qwen3.5 35B-A3B: 50.2 (#122)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| LMArena Non-English | 1402 | 1379 |
| LMArena Chinese | 1438 | 1458 |
| LMArena French | 1430 | 1412 |
| LMArena German | 1420 | 1367 |
| LMArena Japanese | 1404 | 1326 |
| LMArena Korean | 1371 | 1354 |
| LMArena Russian | 1407 | 1377 |
| LMArena Spanish | 1395 | 1390 |

## Instruction Following

- o3: 73.0 (#122)
- Qwen3.5 35B-A3B: 73.0 (#123)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| LMArena Instruction Following | 1368 | 1379 |
| IFEval | 86.9% | — |

## Long Context

- o3: 53.2 (#6)
- Qwen3.5 35B-A3B: 42.4 (#122)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| LMArena Longer Query | 1372 | 1390 |
| Fiction.LiveBench | 88.9% | — |
| CL-bench | 17.8% | — |

## Writing & Preference

- o3: 63.7 (#62)
- Qwen3.5 35B-A3B: 58.1 (#118)

| Benchmark | o3 | Qwen3.5 35B-A3B |
|---|---|---|
| LMArena Text | 1410 | 1395 |
| LMArena Creative Writing | 1359 | 1347 |
| LMArena Multi-Turn | 1405 | 1391 |
| Short-Story Creative Writing | 83.9% | — |
| EQ-Bench Creative Writing | 1676 | — |
| WildBench | 86.1% | — |

## FAQ

### Is o3 better than Qwen3.5 35B-A3B?

o3 is the stronger model overall, scoring 47.4 to 41.7 on the Noometry Index. Qwen3.5 35B-A3B costs 5.1× less per token, which makes it the better buy when o3's lead doesn't matter for your workload.

### Which is cheaper, o3 or Qwen3.5 35B-A3B?

Qwen3.5 35B-A3B is cheaper. It lists at $0.25 per million input tokens and $2 per million output tokens; o3 lists at $2 and $8.

### Is o3 or Qwen3.5 35B-A3B better for coding?

o3 scores higher on coding benchmarks: 47.3 versus 33.5 in the Noometry coding category.

### Which has the bigger context window?

Qwen3.5 35B-A3B does, with 262K tokens against 200K.

### How many benchmarks do o3 and Qwen3.5 35B-A3B share?

24 benchmarks have published results for both models. o3 has 63 scored results on Noometry and Qwen3.5 35B-A3B has 28.